M-ROSE Combined With mNGS in Severe Hospital-acquired Pneumonia

Inclusion Criteria: * Clinical diagnosis of severe hospital-acquired pneumonia * Must have undergone bronchoalveolar lavage Exclusion Criteria: * BALF samples were not sent for mNGS examination * Age \< 18 years old * The hospitalization days ≤ 3 * The clinical data are incomplete * Mechanical ventilation time \> 60 days